Island



(No Model.)

M. DART. LUBRIGATING STOP GOGK.

No. 464,727. Patented Dec. 8, 1891.

Ill/II I UNITED STATES PATENT OFFICE.-

EDIVARD M. DART, OF PROVIDENCE, RIIODE ISLAND.

LUBRICATING STOP-COCK.-

SPECIFICATION forming partof Letters Patent No. 464,727, dated December8, 1891.

Application filed August 10, 1891. Serial No. 402,213- (No model.)

To all whom it may concern.-

Be it known that I, EDWARDYIVI. DART, a citizen of the United States,residing at Providence, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements inSelf-Lubricating Stop-Cocks; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it'appertains to make and usethe same.

This invention relates to an improvement in self-lubricating stop-cocks,the object of the invention being to provide a simple, cheap, efficient,and durable stop-cock adapted for successful and lasting use in all thevarious situations where stop-cocks are needed; and a more particularobject of the present invention is to improve upon or supplement incertain respects the stop-cock described and claimed in my other pendingapplication for patent on a self -lubricating stop-cock filed March 17,1890, Serial No. 344,189 and it therefore consists in the construction,arrangement, and combination of the several parts, substantially as willbe hereinafter described and claimed.

In the annexed drawings, illustrating my invention,Figure 1 is a sideelevation of myimproved stop-cock. Fig. 2 is avertical section of thesame on the line a: as of Fig. 1. Fig. 3 is ahorizontal section on theline y y of Fig. 1.

Similar letters of reference designate corresponding parts throughoutall the difierent figures of the drawings.

A designates the shell of myimproved selflubricating stop-cock, and Bthe rotative plug fitting closely and neatly therein within the seatwhich the shell provides for it. The plug B is provided with the usualtransverse passage b. The plug is also provided with a hori: zontal ortransversely-situated lubricant-containing chamber 0, formed in theupper portion of the plug, the ends of the said chamber being on thesides of the plug, so that the outer shell A may form the end walls forthe chamber 0. Furthermore, the plug is provided with a vertical passageD, extending from the upper end of the plug and communicating with thelubricant-containing chamber C, said passage D being thus adapted toserve as an inlet-opening through which lu bricating material may beplaced within the chamber 0. The upper or outer end of the passage D isadapted to be closed by means of a screw cap or plug a. The lubricant,be-

ing within the chamber 0, spreads itself more clearly define theimprovement which constitutes the present invention.

I will now proceed to describe the features of my present improvement. EE denote vertical grooves of suitable size, which are cut on the innerface of the shell A alongside of the plug B, said grooves being locateddiametrically opposite each other, as shown in Figs-2 and 3, andextending from points adjacent to the opposite ends ofthelubricant-containing chamber 0, when the plug is in the position shownin Fig. 2, to points a short distance from the base of the shell A-saythree-eighths of an inch or so from said base. Considering the fact thatthe plug B is rotated to throw the passage 19 into line to register withthe pipe portions-of the shell or tothrow it out of such line, it willbe readily perceived that the lubricant-containing chamber 0 will atcertain times be in communication with the upper ends of the twovertical grooves or channels E E, and also will at certain times be outof connection with said grooves. In other words,

it may be said that the grooves E E connect with chambers C only atthose intervals or times when the cock is open, it being observed byreference to Fig. 2 that the transverse passage b is located in adirection at right angles to the situation of the chamber 0.

The particular advantage and benefit of the grooves E E consists in thefact that by opening the cock for a short interval the oil or lubricantmay be allowed to distribute itself very quickly into the grooves andaround through the seat of the plug. After the plug has been closed theoperation of difiusion by capillary attraction will take place exactlyas it does in the plug, which is unprovided with the said grooves. Thegrooves, therefore, are

cock properly lubricated through a long pe riod of years.

Having thus described myinvention, whatI claim as new, and desire tosecure by Letters Patent, is-

1. The herein-described stopcock, consisting of a shellproviding aseat-for the plug, a:

plug fitting closely therein and having the usual transverse passage,said plug-beingfurther provided with a lubricant-containing chamberformed in the upper portion'thereof,

the ends of which chamber are on the sides of the plug and are closed bythe wall of the shell, and said plug having'also an inlet-open throughwhich lubricating material may be placed within the chamben-andthevertical grooves formed in the interior face of the wall of the shelland arranged to be in communiing communicating with the saidchamber'cation attheir upper ends with the lubricantcontaining chamber wheneverthe plug is open, but not in communication therewith when the plug isclosed, all substantially as described.

2. The herein-described stop-cock, consisting of ashell providing a seatfor the plug and having on its inner face adjoining the plugseatsuitable vertical grooves running from near the top to near the bottomof the shell, a rotative tapering plug fitting closely within the seatprovided therefor by the shell, said plug having its upper end suitablysquared for t-heapplication thereto of a wrench, and having also theusual transverse passage, and said plug having also a lubricant-chamberformed in the upperportion thereof,the ends of which chamber are on thesides of the plug and are closed by the wall of the shell, aninlet-openin g in the upper end of the plug C0lllmunioa-ting with theaforesaid chamber and adapted to permit the introduction of lubrieatingmaterialinto the'chamber, and a screwiplug for closing saidinletropening, the whole arranged so thatthe lubricating material withinthe chamber may spread itself bycapillary attraction through the jointsbetween the plug and the seat, substantially as described.

In testimony whereof I affi-x my signature in presence of two witnesses.

EDXVARD M. DART. Witnesses:

JOHN T. IIENTHORN, GEO. H. REMINGTON.

